Lee 2017.

Study characteristics
Methods	Study design: registry data Location: UK Time period: 2007 to 2014; data extracted November 2014 Outcome: PDR Outcome measurement: incidence and HR
Participants	Number of participants: 32,553 Diabetes type: T1D and T2D Inclusion criteria: first‐time presenters to eye providers after being referred from the UK national DR screening program; at least 2 DR assessments   Exclusion criteria: anti–vascular endothelial growth factor injections during study period; eyes with neovascularisation at baseline were excluded from survival analyses
Notes	Link to data extraction table, risk of bias assessment, and results: osf.io/xzbwg/?view_only=c8bb1357ce82409eaa0caa59cc1df5d7
Item	Authors' judgement	Support for judgement
Study participation	Unclear	See ‘Notes’ above for link to risk of bias assessment
Study attrition	No	See ‘Notes’ above for link to risk of bias assessment
Prognostic factor measurement	Unclear	See ‘Notes’ above for link to risk of bias assessment
Outcome measurement	Unclear	See ‘Notes’ above for link to risk of bias assessment
Adjustment for other prognostic factors	No	See ‘Notes’ above for link to risk of bias assessment
Statistical analysis and reporting	Yes	See ‘Notes’ above for link to risk of bias assessment